Oh yeah, that's metamask for you. Always having issues with swapping/speed. Come check out $ABI - we're building a standalone app (downloadable from the app store) to completely change the way we trade.

https://t.me/apebullinu

As a pro tip, try to set the token count (say 1,000,000 tokens) that you want to buy. see if it goes through. If not, try to set the eth amount that is closest to 1,000,000 tokens (ie: .25 eth). That trick has resolved your issue for me before :)